resolve-primitives tweaks

resolve-primitives tweaks

* module/ice-9/boot-9.scm (make-struct/no-tail): Define a version of
  this function. Because during optimization we resolve make-struct to
  make-struct/no-tail, we need an implemented make-struct/no-tail if we
  are to be able to run scheme made from tree-il->scheme.

* module/language/tree-il/compile-glil.scm (*primcall-ops*): Remove
  variable-set case, as there is no "variable-set!" primitive.
  (flatten): Add a special hack for variable-set!. Ugly, I know.

* module/language/tree-il/primitives.scm (*effect-free-primitives*): Add
  make-struct/no-tail.
  (*effect+exception-free-primitives*): Remove make-struct, as it could
  raise an exception.
  (variable-set!): Remove expansion to variable-set.